Incandescent gas-lamp.



No. 811,050. I PATBNTED JAN. 30, 1906.

L. 0. FULLER.. INCANDESGENT GAS LAMP.

APPLICATION FILED JUNE 3, 1905.

W/ Tnesses Inventor,

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` Speccaton of Letters Patent.

Patented Jan. 30, 1906.

Application filed June 3, 1905. Serial No. 263,518.

To all whom it may concern.-

'Be it known that I, LoUIs C. FULLER, a citizen of the United States,residing at Kansas City, in the county of Jackson and State of Missouri,have invented certain new and useful Improvements in Incandescent Gas-Larnps, of which the following is a specification.

My invention relates to incandescent gaslamps; and the objects of myinvention are to spread the flame to better advantage, to provide abetter air-supply for the flame, to prevent the usual heating andcorrosion of the chimney-holder, to provide means for holding thechimney firmly in the holder, to provide an improved mantle-support, andto provide an improved shade-holder.

In the accompanying drawings, Figure 1 is a centralv vertical section ofmy lamp, a portion of the shade-holder being not in section and. aportion of the chimney being broken out. Fig. 2 is a detached view of myantirattling device for the chimney. Fig. 3 is a top detached view ofthe heat-insulating bushing. Fig. /1 is a top detached view of theair-inlet screen. Fig. 5 is a transverse section of my improved Bunsensteun taken through the induction-ports. F ig. 6 is an elevation of themantle-support. Fig. 7 is a plan view of the shade-holder, taken on asmaller scale than Fig. 1.

1 is the lamp-supporting nipple, upon which is screwed the usualcheck-chamber 2. Upon this chamber is screwed the Bunsen stem or tube 3.The' three inductionppenings 4 in this tube I make larger than is usualin order to admit a greater flow of air to the ascending gas. In anexperimental way this enlarging of these ports has been tried by others,and the result was a failure, for the reason that when lighting the lampit llighted down-that is, the gas ignited through said ports, also thelamp when burning emit ted a roaring sound. I have provided means forobviating both the lightingidown and the roaring. This means consists ina cylindrical or tubular screen 5, made of suitable foraminated materialslipped over thestem 6 of the regulator 7. This stem 6 has the usualslots which register with those of the Bunsen stem 3. As shown, thescreen 5 is made of perforated sheet metal; but it may be formed ofwire-cloth. With this screen the induction-openings may be considerablylarger than would be possible without it, and the lamp will not roar norlight down.

Upon the Bunsen stem 3 is mounted my improved burner-support andchimney-sup'- port, comprising a tube or sleeve 8, snuglyfitting stem 3,a spider 9, rigidly secured to sleeve 8, and vertical fingers 10,.integral with said spider. To one of said fingers my improvedantirattling device for the chimney may be attached. It is well knownthat chimneys of the same nominal size vary in size. Hence the fingers10 must be far enough apart to receive the largest. My device consistsof a spring 12, (shown detached in Fig. 2,) made integral with a sleeve13. This sleeve is adapted to be tightly fitted on the upper end of oneof the fingers 10, as shown in Fig. 1. It always bears against thechimney. Hence the latter is firmly held and cannot rattle.

It will be observed that the tip 14 is not mounted directly upon thetube 8, but is mounted on a bushing 15, which fits around said tube andextends thcreabove. This bushing is made of hard compressed. asbestos orsome other suitable heat-insulating material. Its function is to preventthe usual heating and resulting corrosion of the chimney-holder justdescribed.. Thus no matter how long the light has been burning thechimney-holder may be handled with the bare fingers, and though it maybe warm it will not be so hot as to prevent handling the same.

Mounted on the upper end of the asbestos bushing 15 is a brass thimble16, and fitted upon said. thimble is the tip-holder 17. The tip itself,14, is of novel form in that it is eX- tended in the form of a cap abovethe top of the holder 17. Preferably about one-fourth of an inchistheheight of the tip above its holder. By this construction a largersurface of the wire-cloth is exposed to the air, while the diameter ofthe tip is not thereby increased. I employ a spreader disk or washer 18,attached by a rivet, as shown but this, I am aware, is not new. Thisform of tip, as shown, enlarges the iiame of the lamp to betteradvantage than any other tip of which I am aware.

I have further provided an improved mantie-support. This is shown inFigs. l and 6, from which its construction will readily be understood.It is formed of a single piece of wire. It comprises a looped hook 20,adapted to engage the upper edge of the chimney, a depending inner leg21, and a stem 22, having a mantle-supporting hook 23. The end IOO lIO

of the leg 21 rests in contact with the inner side of the chimney. Theadvantages of this mantle-support are it has no unsightly stem runningup alongside the chimney, it is small, neat, and cheap, is easilyattached to and detached from a chimney, and it holds the mantle withinthe chimney when the latter is removed, Whereas the old stylemantle-support had to be detached before the chimney could be removed.improved shade-holder. This is shown in Figs. l and 7, the latter beinga plan view on a smaller scale. This holder comprises a ring 24 andthree arms 25, secured thereto. From the ring these arms extend upwardlyand terminate in hooks 26, which are hung on the top of the chimney.From the ring the arms also extend downwardly, then outwardly, as shown,so that each arm engages the shade 27 at two points, as shown. Each armis strongly secured to the ring by two rivets 28, so that the armscannot turn, as would be possible if but one rivet were used. To receivethe rivets, each arm 25 is formed with two lugs 29. (Shown in Fig. 7.)

Having described my invention, what I I have further provided any claimas new, and desire to secure by Letters Patent, is-

l. ln an incandescent gas-lamp having a Bunsen tube, an outer tubesleeved thereon and a chimney-holder secured to said outer tube, thecombination of a heat-insulating bushing mounted upon said outer tube,and a tip-holder mounted upon said bushing; whereby the heatcommunicated by the flame to the tip-holder will be insulated from thechimney-holder.

2. In a mantle gas-lamp, a mantle-holder i formed of a single piece ofwire and comprising a looped hook adapted to engage the upper edge of achimney, a downwardly-extending leg adapted to bear against the innerside of a chimney, and a depending hook adapted to support a mantle;substantially as described. i

In testimony whereor` I aflix my signature in the presence of twowitnesses.

LOUIS C. FULLER.

